package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    private Orders orders;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());
        orders.setConsignee(addressBook.getConsignee());
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setPayStatus(Orders.UN_PAID);
        orders.setOrderTime(LocalDateTime.now());
        orders.setUserId(userId);
        this.orders = orders;


        //向订单表插入1条数据
        orderMapper.insert(orders);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.deleteById(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;//订单状态 待接单
        Integer OrderPaidStatus = Orders.PAID;//支付状态 已支付
        LocalDateTime check_out_time = LocalDateTime.now();//更新支付时间

        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, this.orders.getId());
//通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",this.orders.getId());
        map.put("content","订单号："+this.orders.getNumber());
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);


        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);



    }


    /*
     * 历史订单查询
     *
     * */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        //设置分页
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        PageHelper.startPage(pageNum, pageSize);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);


        //查询出订单明细，并封装入OrderVO进行响应
        List<OrderVO> list = new ArrayList<>();

        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);

            }
        }

        return new PageResult(page.getTotal(), list);
    }


    /*
     * 查询订单详情
     * */
    public OrderVO details(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);

        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;


    }


    /*
     * 取消订单
     * */
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders order = orderMapper.getById(id);
        // 校验订单是否存在
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (order.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(order.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (order.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    order.getNumber(), //商户订单号
//                    order.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }


        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);


    }

    /*
     * 再来一单
     * */
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            //将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;

        }).collect(Collectors.toList());
        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);

    }


    /*
     * 订单搜素
     * */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        //查询出订单的信息封装到page
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        //取出page中的订单信息 封装到集合中
        List<Orders> ordersList = page.getResult();

        //判断集合不为空时 则遍历集合 定义一个VO对象作为回传对象 将集合对象的属性值重新拷贝到VO对象中
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                //对订单信息进行处理  将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）  调用getOrderDishesStr方法
                String orderDishes = getOrderDishesStr(orders);

                //将封装完整的VO对象添加到集合中
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);

            }

        }
        //   并返回
        return orderVOList;
    }


    /*
     * 根据订单id获取菜品信息字符串
     * */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量)  获取订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将每一条订单中的菜品信息拼接为字符串（格式：宫保鸡丁*3；）  利用Stream流来实现
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;

        }).collect(Collectors.toList());


        // 将该订单对应的所有菜品信息拼接在一起

        return String.join("", orderDishList);
    }


    /*
     * 各个状态的订单数量统计
     * */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        return null;
    }

    /*
     * 接单
     * */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //修改订单的状态
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }


    /*
     * 拒单
     * */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单

        //判断订单为空或者订单状态不为2 则直接抛出异常
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {

            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //订单状态=2  则判断用户的支付状态
        Integer payStatus = ordersDB.getStatus();
        if (payStatus == Orders.PAID) {//如果用户已经支付 则需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款：");

        }

        // 根据订单id更新订单状态、拒单原因、取消时间  封装到自定义的Orders对象中
        Orders orders = new Orders();
        orders.setStatus(Orders.CANCELLED);
        orders.setId(ordersDB.getId());
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        //调用mapper中的update方法更新状态
        orderMapper.update(orders);

    }

    /*
     * 取消订单
     * */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //根据ID获取订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {

            log.info("申请退款:");

        }

        Orders orders = new Orders();
        orders.setStatus(Orders.CANCELLED);
        orders.setId(ordersDB.getId());
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        //调用mapper中的update方法更新状态
        orderMapper.update(orders);


    }


    /*
     * 派送订单
     * */

    public void delivery(Long id) {
        //根据id 查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3 （已确认） false则抛出异常
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //为3则 设置订单状态和id号  并用自定义orders对象接收
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        //更新订单信息
        orderMapper.update(orders);

    }



    /*
     * 完成订单
     * */

    public void complete(Long id) {
        //根据ID获取订单信息
        Orders ordersDB = orderMapper.getById(id);

        //如果订单为空或者不在派送中 则抛出状态异常
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        //更新
        orderMapper.update(orders);


    }

    /*
    * 客户催单
    * */
    public void reminder(Long id) {
        //根据ID查询订单
        Orders orderDB = orderMapper.getById(id);
        //检验订单是否存在
        if (orderDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map =new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号:"+orderDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));


    }
}











